Helicase unwinds and opens up the DNA double helix at the start of DNA replication.
a. Polymerization
b. Nucleotide excision repair
c. Mismatch repair
d. Mutation
d. Mutation
If mistakes made during DNA replication are not caught and repaired, they can lead to permanent changes called mutations that are passed on in subsequent DNA replication.
You might also like to view...
All organ systems in a human embryo have formed by ____
a. day 5 b. week 2 c. week 8 d. week 15 e. the 8th month
The earliest photosynthetic autotrophs were probably:a
similar to the green and purple sulfur bacteria of today. b. first formed about 1 billion years ago. c. the first organisms to release oxygen. d. obligate aerobes. e. fermenting heterortrophs
Which of the following normally occurs regardless of whether or not oxygen (O2 ) is present?
A) glycolysis B) fermentation C) citric acid cycle D) oxidative phosphorylation (chemiosmosis)
Bicarbonate that neutralizes stomach acid is produced by the
A. small intestine. B. duodenum. C. liver. D. large intestine. E. pancreas.